FR1519517A - Dispositif permettant le réglage du passage des rayons infra-rouges des surfaces transparentes et l'utilisation des applications en découlant
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Dispositif permettant le réglage du passage des rayons infra-rouges des surfaces transparentes et l'utilisation des applications en découlant
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G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
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FR17958A1965-05-211965-05-21Dispositif permettant le réglage du passage des rayons infra-rouges des surfaces transparentes et l'utilisation des applications en découlant
ExpiredFR1519517A
(fr)